LXR linux/drivers/dax/pmem/compat.c

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
   3#include <linux/percpu-refcount.h>
   4#include <linux/memremap.h>
   5#include <linux/module.h>
   6#include <linux/pfn_t.h>
   7#include <linux/nd.h>
   8#include "../bus.h"
   9
  10/* we need the private definitions to implement compat suport */
  11#include "../dax-private.h"
  12
  13static int dax_pmem_compat_probe(struct device *dev)
  14{
  15        struct dev_dax *dev_dax = __dax_pmem_probe(dev, DEV_DAX_CLASS);
  16        int rc;
  17
  18        if (IS_ERR(dev_dax))
  19                return PTR_ERR(dev_dax);
  20
  21        if (!devres_open_group(&dev_dax->dev, dev_dax, GFP_KERNEL))
  22                return -ENOMEM;
  23
  24        device_lock(&dev_dax->dev);
  25        rc = dev_dax_probe(&dev_dax->dev);
  26        device_unlock(&dev_dax->dev);
  27
  28        devres_close_group(&dev_dax->dev, dev_dax);
  29        if (rc)
  30                devres_release_group(&dev_dax->dev, dev_dax);
  31
  32        return rc;
  33}
  34
  35static int dax_pmem_compat_release(struct device *dev, void *data)
  36{
  37        device_lock(dev);
  38        devres_release_group(dev, to_dev_dax(dev));
  39        device_unlock(dev);
  40
  41        return 0;
  42}
  43
  44static int dax_pmem_compat_remove(struct device *dev)
  45{
  46        device_for_each_child(dev, NULL, dax_pmem_compat_release);
  47        return 0;
  48}
  49
  50static struct nd_device_driver dax_pmem_compat_driver = {
  51        .probe = dax_pmem_compat_probe,
  52        .remove = dax_pmem_compat_remove,
  53        .drv = {
  54                .name = "dax_pmem_compat",
  55        },
  56        .type = ND_DRIVER_DAX_PMEM,
  57};
  58
  59static int __init dax_pmem_compat_init(void)
  60{
  61        return nd_driver_register(&dax_pmem_compat_driver);
  62}
  63module_init(dax_pmem_compat_init);
  64
  65static void __exit dax_pmem_compat_exit(void)
  66{
  67        driver_unregister(&dax_pmem_compat_driver.drv);
  68}
  69module_exit(dax_pmem_compat_exit);
  70
  71MODULE_LICENSE("GPL v2");
  72MODULE_AUTHOR("Intel Corporation");
  73MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_PMEM);
  74